Title

Author

Abstract

"Optical oxygen sensing uses luminophores such as metal complex dyes that respond to oxygen when illuminated by their specific excitation wavelengths. Traditional optical instruments are mostly spectrometric instruments based on the measurements of emission, absorption or reflection. There is, however, a great need to develop simple, economical, photometric detection components toward quantitative and two-dimensional imaging instruments.

In this work, familiar optoelectronic devices were utilized to demonstrate a simple determination method of gaseous oxygen both quantitatively and qualitatively. A liquid crystal display (LCD) screen and a color charge-coupled device (CCD) camera were employed as a light source for fluorescence excitation and a photodetector for emission measurement, respectively. Meso-scale test platforms incorporating fluidic channels and oxygen sensor films were prepared. The ruthenium-complex sensor films were excited by blue light displayed from the LCD screen to emit fluorescence responding to gaseous oxygen. The color camera was used successfully to characterize red fluorescence emission from sensor films based on colorimetric intensity measurements.

This method has an advantage over simplicity of the equipment and is considered a good alternative approach to time-resolved methods for relatively short-term monitoring. This combination of LCD and color camera enables a capability of uniform illumination over a large area with variable wavelength ranges to image spatial distribution of chemicals and to analyze multiple target analytes simultaneously"--Abstract, page iv.